EP3114338B1 - Carbon scraper - Google Patents
Carbon scraper Download PDFInfo
- Publication number
- EP3114338B1 EP3114338B1 EP15758916.9A EP15758916A EP3114338B1 EP 3114338 B1 EP3114338 B1 EP 3114338B1 EP 15758916 A EP15758916 A EP 15758916A EP 3114338 B1 EP3114338 B1 EP 3114338B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- annular
- barrier coating
- metallic shell
- thermal barrier
- scraper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title description 16
- 229910052799 carbon Inorganic materials 0.000 title description 16
- 239000012720 thermal barrier coating Substances 0.000 claims description 58
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 229910010293 ceramic material Inorganic materials 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 8
- 239000000446 fuel Substances 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012552 review Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/004—Cylinder liners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/20—Other cylinders characterised by constructional features providing for lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
- F16J10/02—Cylinders designed to receive moving pistons or plungers
- F16J10/04—Running faces; Liners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F2001/006—Cylinders; Cylinder heads having a ring at the inside of a liner or cylinder for preventing the deposit of carbon oil particles, e.g. oil scrapers
Definitions
- This disclosure relates to a system for scraping carbon from a piston of an internal combustion engine.
- Carbon scraper rings also referred to as anti-polishing rings, may be positioned within an engine to scrape down carbon deposits that accumulate on the side of the top of the piston, for example above the top piston ring, when the piston moves up into the top dead center position.
- the removal of such carbon deposits helps prevent the formation of hard deposits on the piston that can damage the engine as the piston moves up and down.
- GB2009884 describes a cylinder for a reciprocating piston internal combustion engine. The head of an engine cylinder is fitted with a ring having a bore forming a local constriction of the cylinder, the bore having a taper corresponding to that of the top land of the piston.
- US2005/0279296 describes a cylinder for an internal combustion engine.
- a cylinder for an internal combustion engine having a metallic ring surrounding the top of the cylinder.
- An insulating ring is provided at the top of the cylinder between the metallic ring and the cylinder wall. The axial extent of the insulating ring is less than that of the metallic ring and is determined so that it diverts some of the heat away from the relatively poorly cooled zone towards the top of the cylinder, but does not significantly obstruct the heat flow to surrounding cooling channels.
- an engine assembly that includes a cylinder block having a cylinder bore disposed therein.
- the cylinder bore is configured to house a piston.
- the engine assembly further includes an annular scraper disposed within the cylinder bore.
- the annular scraper is positioned concentrically in the cylinder bore.
- the annular scraper includes an outer annular metallic shell portion and an inlaid thermal barrier coating portion.
- the inlaid thermal barrier coating portion is positioned in an annular recess in the outer annular metallic shell portion.
- the inlaid thermal barrier coating portion is concentric with the outer annular metallic shell portion.
- At least one radially inner and axially outer edge of the annular scraper includes the outer annular metallic shell portion.
- the inlaid thermal barrier coating portion of the annular scraper is positioned between a first edge and a second edge of the annular scraper, where the first edge and the second edge including the annular metallic shell portion and where the first edge and the second edge each disposed at a radially inner and axially outer position.
- the outer annular metallic shell portion of the annular scraper includes steel, in accordance with particular embodiments.
- the inlaid thermal barrier coating portion includes a material having a lower thermal conductivity than the outer annular metallic shell portion, in particular embodiments.
- the inlaid thermal barrier coating portion includes a non-metallic material having a lower thermal conductivity than the metallic scraper.
- the inlaid thermal barrier coating portion may comprise a ceramic material.
- An inner diameter of the inlaid thermal barrier coating portion may be substantially the same as an inner diameter of the outer annular metallic shell portion.
- the engine assembly also includes a cylinder liner disposed in the cylinder bore.
- the annular scraper is positioned within a recess in the cylinder liner, in particular embodiments.
- the engine assembly may also have a piston disposed within the cylinder bore and within the cylinder liner.
- the annular scraper is positioned within the cylinder bore between a cylinder head and the piston, the cylinder head configured to house an intake port, an intake valve, an exhaust port, and an exhaust valve.
- the method includes forming a cylinder block having a cylinder bore disposed therein.
- the cylinder bore is configured to house a piston.
- the method further includes positioning an annular scraper in the cylinder bore such that the annular scraper is concentric with the cylinder bore.
- the annular scraper includes an outer annular metallic shell portion and an inlaid thermal barrier coating portion.
- the inlaid thermal barrier coating portion is positioned within an annular recess between an upper and radially inner edge and a lower and radially inner edge, the upper and radially inner edge and the lower and radially inner edge are positioned on an axially outer edge of the annular scraper.
- the inlaid thermal barrier coating portion is concentric with the outer annular metallic shell portion.
- the method also includes positioning the inlaid thermal barrier coating portion within the annular recess in the outer annular metallic shell portion such that at least one radially inner and axially outer edge of the annular scraper includes the outer annular metallic shell portion.
- the inlaid thermal barrier coating portion is positioned within the annular recess in the outer annular metallic shell portion such that the inlaid thermal barrier coating portion is positioned between a first edge and a second edge of the annular scraper, where the first edge and the second edge including the annular metallic shell portion and where the first edge and the second edge each disposed at a radially inner and axially outer position.
- the method may also include positioning a cylinder liner in the cylinder bore.
- the annular scraper may be positioned within a recess in the cylinder liner.
- the inlaid thermal barrier coating portion may a ceramic material.
- the inlaid thermal barrier coating portion includes a material having a lower thermal conductivity than the outer annular metallic shell portion.
- annular scraper for cleaning a portion of a piston in an engine assembly.
- the annular scraper includes an outer annular metallic shell portion having an annular recess therein.
- the annular scraper also includes an inlaid thermal barrier coating portion positioned within the annular recess of the outer annular metallic shell portion such that the inlaid thermal barrier coating portion is concentric with an outer annular metallic shell portion.
- At least one radially inner and axially outer edge of the annular scraper includes the outer annular metallic shell portion.
- the inlaid thermal barrier coating portion of the annular scraper is positioned between a first edge and a second edge of the annular scraper, where the first edge and the second edge including the annular metallic shell portion and where the first edge and the second edge each disposed at a radially inner and axially outer position.
- the inlaid thermal barrier coating portion may include a material having a lower thermal conductivity than the outer annular metallic shell portion.
- the inlaid thermal barrier coating portion may a ceramic material.
- An inner diameter of the inlaid thermal barrier coating portion may be substantially the same as an inner diameter of the outer annular metallic shell portion.
- an engine assembly that includes a cylinder block having a cylinder bore disposed therein.
- the cylinder bore is configured to house a piston.
- the engine assembly further includes an annular scraper disposed within the cylinder bore.
- the annular scraper is an annular scraper according to the appended claims.
- the annular scraper is positioned concentrically in the cylinder bore.
- the annular scraper includes an outer annular metallic shell portion and a thermal barrier coating portion, concentric with the outer annular metallic shell portion.
- At least one radially inner and axially outer edge of the annular scraper includes the outer annular metallic shell portion.
- the outer annular metallic shell portion of the annular scraper may include steel.
- the thermal barrier coating portion may include a material having a lower thermal conductivity than the outer annular metallic shell portion, in accordance with particular embodiments.
- the thermal barrier coating portion may include a ceramic material.
- FIG. 1 is a sectional side view of an engine assembly including a carbon scraper.
- the engine assembly 100 includes a cylinder block 101 that includes at least one cylinder bore 102 disposed therein.
- the engine assembly 100 may comprise, for example a diesel engine or a natural gas engine.
- the cylinder block 101 includes a block having cylinder bores, which may be configured, for example, in a v-shaped configuration or an inline configuration.
- the cylinder bore 102 is a cylindrical opening that is configured to house a piston such as piston 103 shown in Figure 1 .
- the piston 103 in the illustrated embodiment, includes a piston ring 106 and valve recesses 107.
- the piston ring 106 is the top ring in the illustrated embodiment.
- the cylinder block 101 is capped with a cylinder head 105.
- the cylinder head 105 includes openings through which the intake valve and exhaust valve extend.
- the engine assembly 100 may also include a gasket 109 positioned between the cylinder head 105 and the cylinder block 101.
- the cylinder bore 102 may also include a cylinder liner 104 positioned concentrically about the piston 103 between the piston 103 and the cylinder block 101.
- an annular scraper 110 is positioned in the cylinder bore 102 at the top of the bore, such that the annular scraper 110 surrounds at least a top portion of the piston 103 when the piston is moved to a top dead center position.
- the annular scraper 110 is positioned in an annular recess 116 formed by the cylinder liner 104.
- the annular scraper 110 is concentric with the cylinder bore 102 and the piston 103.
- the annular scraper 110 may have an inner diameter that is smaller than the inner diameter of the cylinder liner 104.
- FIG. 2 illustrates a side sectional view of the carbon scraper of Figure 1 .
- the annular scraper 110 includes an outer annular metallic shell portion 111 and an inlaid thermal barrier coating portion 112 positioned within an annular recess 113 formed in the outer annular metallic shell portion 111 of the annular scraper 110.
- the inlaid thermal barrier coating portion 112 is coupled to and concentric with the outer annular metallic shell portion 111.
- the inlaid thermal barrier coating portion 112 is composed of a material having a lower thermal conductivity than the outer annular metallic shell portion 111.
- the inlaid thermal barrier coating portion 112 is composed of a ceramic material.
- the outer annular metallic shell portion 111 is composed of steel.
- the inlaid thermal barrier coating portion 112 is positioned within the annular recess 113 such that the inlaid thermal barrier coating portion 112 is between an upper and radially inner edge 114 and a lower and radially inner edge 115.
- Each of the upper and radially inner edge 114 and the lower and radially inner edge 115 are on an axially outer edge or axially outer extremity of the annular scraper 110 with respect to an axis extending through the center of and concentric with the annular scraper 110 such that the annular scraper 110 encircles the axis.
- the upper and radially inner edge 114 and the lower and radially inner edge 115 comprise a portion of the outer annular metallic shell portion 111.
- the exposed metal edge (e.g. the lower and radially inner edge 115, which is on one of the axially outer edges of the annular scraper) of the annular scraper 110 contacts carbon deposits disposed on the side of the piston landing 117 and scrapes down the carbon deposits, while preserving the inlaid thermal barrier coating portion 112 and limiting debonding of the inlaid thermal barrier coating portion 112. Removal of carbon deposits from the piston 103 prevents those deposits from scratching and damaging the cylinder liner 104 as the piston reciprocates up and down between the top dead center and bottom dead center positions.
- the inlaid thermal barrier coating portion 112 acts as a thermal insulator that reduces the amount of heat that is transferred from hot combustion gases disposed between the piston landing 117 of the piston 103, the cylinder head 105 to the cylinder liner 104.
- the reduction in heat transfer from the hot combustion gases to the cylinder liner 104 reduces the temperature of the liner and improves the fuel efficiency of engine assembly 100.
- an oil film on the cylinder liner 104 is more aptly retained on the liner at the reversal point of the piston ring 106, thereby permitting the piston ring 106 to be placed higher in relation to the piston, thereby reducing the top land crevice volume (i.e.
- the fuel air mixture in the top land crevice volume is usually the last part of the mixture to burn, particularly on a pre-mixed gas engine. Accordingly, the fuel air mixture in that volume may not be completely burned, thereby generating unburnt hydrocarbon emissions and reducing the engines brake thermal efficiency. As such, reducing the heat loss (via transfer to the cylinder liner wall) through the use of the thermal barrier coating helps keep the top land crevice volume warmer permitting more complete combustion.
- the inlaid thermal barrier coating portion 112 and the upper and radially inner edge 114 and the lower and radially inner edge 115 may have substantially the same inner diameter.
- the annular scraper 110 is illustrated in a symmetric configuration which permits the annular scraper 110 to be installed in either direction, but the annular scraper 110 may be asymmetric in accordance with example embodiments.
- a thermal barrier coating portion of the annular scraper 110 may be bonded to a non-recessed surface of the outer annular metallic shell portion 111.
- the radially inner surface of the outer annular metallic shell may be linear or smooth, and a thermal barrier coating may be applied to a portion of the smooth surface.
- the lower and radially inner edge 115 of the outer annular metallic shell portion 111 may extend further radially inward than the thermal barrier coating and the upper and radially inner edge 114 of the outer annular metallic shell portion 111 may not extend as far radially inward as the lower radially inner edge 115 of the outer annular metallic shell portion 111.
- the term “coupled” means the joining of two members directly or indirectly to one another. Such joining may be stationary or moveable in nature. Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate members being attached to one another. Such joining may be permanent in nature or may be removable or releasable in nature.
- the technology described herein may be embodied as a method, of which at least one example has been provided.
- the acts performed as part of the method may be ordered in any suitable way unless otherwise specifically noted. Accordingly, embodiments may be constructed in which acts are performed in an order different than illustrated, which may include performing some acts simultaneously, even though shown as sequential acts in illustrative embodiments as long as such methods fall within the scope of the amended claims.
- the phrase "at least one,” in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements.
- This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase "at least one" refers, whether related or unrelated to those elements specifically identified.
- At least one of A and B can refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including elements other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including elements other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other elements); etc.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
- The present application claims the benefit of priority from
U. S. Provisional Patent Application Serial No. 61/947,273, filed on March 3, 2014 - This disclosure relates to a system for scraping carbon from a piston of an internal combustion engine.
- Carbon scraper rings, also referred to as anti-polishing rings, may be positioned within an engine to scrape down carbon deposits that accumulate on the side of the top of the piston, for example above the top piston ring, when the piston moves up into the top dead center position. The removal of such carbon deposits helps prevent the formation of hard deposits on the piston that can damage the engine as the piston moves up and down.
GB2009884 US2005/0279296 describes a cylinder for an internal combustion engine. In particular, there is described a cylinder for an internal combustion engine having a metallic ring surrounding the top of the cylinder. An insulating ring is provided at the top of the cylinder between the metallic ring and the cylinder wall. The axial extent of the insulating ring is less than that of the metallic ring and is determined so that it diverts some of the heat away from the relatively poorly cooled zone towards the top of the cylinder, but does not significantly obstruct the heat flow to surrounding cooling channels. - Various embodiments provide systems and methods for scraping carbon from a piston of an internal combustion engine. In particular embodiments, an engine assembly is provided that includes a cylinder block having a cylinder bore disposed therein. The cylinder bore is configured to house a piston. The engine assembly further includes an annular scraper disposed within the cylinder bore. The annular scraper is positioned concentrically in the cylinder bore. The annular scraper includes an outer annular metallic shell portion and an inlaid thermal barrier coating portion. The inlaid thermal barrier coating portion is positioned in an annular recess in the outer annular metallic shell portion. The inlaid thermal barrier coating portion is concentric with the outer annular metallic shell portion.
- In particular embodiments, at least one radially inner and axially outer edge of the annular scraper includes the outer annular metallic shell portion. The inlaid thermal barrier coating portion of the annular scraper is positioned between a first edge and a second edge of the annular scraper, where the first edge and the second edge including the annular metallic shell portion and where the first edge and the second edge each disposed at a radially inner and axially outer position. The outer annular metallic shell portion of the annular scraper includes steel, in accordance with particular embodiments. The inlaid thermal barrier coating portion includes a material having a lower thermal conductivity than the outer annular metallic shell portion, in particular embodiments. In particular embodiments, the inlaid thermal barrier coating portion includes a non-metallic material having a lower thermal conductivity than the metallic scraper. The inlaid thermal barrier coating portion may comprise a ceramic material. An inner diameter of the inlaid thermal barrier coating portion may be substantially the same as an inner diameter of the outer annular metallic shell portion. In particular embodiments, the engine assembly also includes a cylinder liner disposed in the cylinder bore. The annular scraper is positioned within a recess in the cylinder liner, in particular embodiments. The engine assembly may also have a piston disposed within the cylinder bore and within the cylinder liner. In particular embodiments, the annular scraper is positioned within the cylinder bore between a cylinder head and the piston, the cylinder head configured to house an intake port, an intake valve, an exhaust port, and an exhaust valve.
- Other various embodiments provide a method of manufacturing an engine assembly. The method includes forming a cylinder block having a cylinder bore disposed therein. The cylinder bore is configured to house a piston. The method further includes positioning an annular scraper in the cylinder bore such that the annular scraper is concentric with the cylinder bore. The annular scraper includes an outer annular metallic shell portion and an inlaid thermal barrier coating portion. The inlaid thermal barrier coating portion is positioned within an annular recess between an upper and radially inner edge and a lower and radially inner edge, the upper and radially inner edge and the lower and radially inner edge are positioned on an axially outer edge of the annular scraper. The inlaid thermal barrier coating portion is concentric with the outer annular metallic shell portion.
- In particular embodiments, the method also includes positioning the inlaid thermal barrier coating portion within the annular recess in the outer annular metallic shell portion such that at least one radially inner and axially outer edge of the annular scraper includes the outer annular metallic shell portion. The inlaid thermal barrier coating portion is positioned within the annular recess in the outer annular metallic shell portion such that the inlaid thermal barrier coating portion is positioned between a first edge and a second edge of the annular scraper, where the first edge and the second edge including the annular metallic shell portion and where the first edge and the second edge each disposed at a radially inner and axially outer position. The method may also include positioning a cylinder liner in the cylinder bore. The annular scraper may be positioned within a recess in the cylinder liner. The inlaid thermal barrier coating portion may a ceramic material. In particular embodiments, the inlaid thermal barrier coating portion includes a material having a lower thermal conductivity than the outer annular metallic shell portion.
- In various embodiments, an annular scraper for cleaning a portion of a piston in an engine assembly is provided. The annular scraper includes an outer annular metallic shell portion having an annular recess therein. The annular scraper also includes an inlaid thermal barrier coating portion positioned within the annular recess of the outer annular metallic shell portion such that the inlaid thermal barrier coating portion is concentric with an outer annular metallic shell portion.
- At least one radially inner and axially outer edge of the annular scraper includes the outer annular metallic shell portion. The inlaid thermal barrier coating portion of the annular scraper is positioned between a first edge and a second edge of the annular scraper, where the first edge and the second edge including the annular metallic shell portion and where the first edge and the second edge each disposed at a radially inner and axially outer position. The inlaid thermal barrier coating portion may include a material having a lower thermal conductivity than the outer annular metallic shell portion. The inlaid thermal barrier coating portion may a ceramic material. An inner diameter of the inlaid thermal barrier coating portion may be substantially the same as an inner diameter of the outer annular metallic shell portion.
- Other particular embodiments provide an engine assembly that includes a cylinder block having a cylinder bore disposed therein. The cylinder bore is configured to house a piston. The engine assembly further includes an annular scraper disposed within the cylinder bore. The annular scraper is an annular scraper according to the appended claims. The annular scraper is positioned concentrically in the cylinder bore. The annular scraper includes an outer annular metallic shell portion and a thermal barrier coating portion, concentric with the outer annular metallic shell portion.
- At least one radially inner and axially outer edge of the annular scraper includes the outer annular metallic shell portion. The outer annular metallic shell portion of the annular scraper may include steel. The thermal barrier coating portion may include a material having a lower thermal conductivity than the outer annular metallic shell portion, in accordance with particular embodiments. The thermal barrier coating portion may include a ceramic material.
- The inventors have appreciated that engine performance may be enhanced by scraping carbon from a piston in an internal combustion engine. The inventors have also appreciated that reducing heat transfer loss or increasing thermal efficiency at the interface of a carbon scraper ring improves the fuel efficiency of the engine and reduces unburnt hydrocarbon emissions. It should be appreciated that all combinations of the foregoing concepts and additional concepts discussed in greater detail below (provided such concepts are not mutually inconsistent) are contemplated as being part of the inventive subject matter disclosed herein. In particular, all combinations of claimed subject matter appearing at the end of this disclosure are contemplated as being part of the inventive subject matter disclosed herein.
- The skilled artisan will understand that the drawings primarily are for illustrative purposes and are not intended to limit the scope of the subject matter described herein, it being appreciated that the scope of protection is defined by the appended claims. The drawings are not necessarily to scale; in some instances, various aspects of the subject matter disclosed herein may be shown exaggerated or enlarged in the drawings to facilitate an understanding of different features. In the drawings, like reference characters generally refer to like features (e.g., functionally similar and/or structurally similar elements).
-
Figure 1 is a sectional side view of an engine assembly including a carbon scraper in accordance with example embodiments. -
Figure 2 illustrates a side sectional view of the carbon scraper ofFigure 1 . - The features and advantages of the inventive concepts disclosed herein will become more apparent from the detailed description set forth below when taken in conjunction with the drawings.
- Following below are more detailed descriptions of various concepts related to, and embodiments of, inventive systems, and methods of scrapping carbon from a piston of an internal combustion engine. It should be appreciated that various concepts introduced above and discussed in greater detail below may be implemented in any of numerous ways, as the disclosed concepts are not limited to any particular manner of implementation so long as they fall within the scope of the amended claims.
-
Figure 1 is a sectional side view of an engine assembly including a carbon scraper. The engine assembly 100 includes acylinder block 101 that includes at least one cylinder bore 102 disposed therein. The engine assembly 100 may comprise, for example a diesel engine or a natural gas engine. Thecylinder block 101 includes a block having cylinder bores, which may be configured, for example, in a v-shaped configuration or an inline configuration. The cylinder bore 102 is a cylindrical opening that is configured to house a piston such aspiston 103 shown inFigure 1 . Thepiston 103, in the illustrated embodiment, includes a piston ring 106 and valve recesses 107. The piston ring 106 is the top ring in the illustrated embodiment. Thecylinder block 101 is capped with acylinder head 105. Thecylinder head 105 includes openings through which the intake valve and exhaust valve extend. The engine assembly 100 may also include agasket 109 positioned between thecylinder head 105 and thecylinder block 101. The cylinder bore 102 may also include acylinder liner 104 positioned concentrically about thepiston 103 between thepiston 103 and thecylinder block 101. As shown inFigure 1 , anannular scraper 110 is positioned in the cylinder bore 102 at the top of the bore, such that theannular scraper 110 surrounds at least a top portion of thepiston 103 when the piston is moved to a top dead center position. In the illustrated embodiment, theannular scraper 110 is positioned in anannular recess 116 formed by thecylinder liner 104. Theannular scraper 110 is concentric with the cylinder bore 102 and thepiston 103. Theannular scraper 110 may have an inner diameter that is smaller than the inner diameter of thecylinder liner 104. -
Figure 2 illustrates a side sectional view of the carbon scraper ofFigure 1 . As demonstrated inFigure 2 , theannular scraper 110 includes an outer annularmetallic shell portion 111 and an inlaid thermalbarrier coating portion 112 positioned within an annular recess 113 formed in the outer annularmetallic shell portion 111 of theannular scraper 110. The inlaid thermalbarrier coating portion 112 is coupled to and concentric with the outer annularmetallic shell portion 111. The inlaid thermalbarrier coating portion 112 is composed of a material having a lower thermal conductivity than the outer annularmetallic shell portion 111. In particular embodiments, the inlaid thermalbarrier coating portion 112 is composed of a ceramic material. In particular embodiments, the outer annularmetallic shell portion 111 is composed of steel. The inlaid thermalbarrier coating portion 112 is positioned within the annular recess 113 such that the inlaid thermalbarrier coating portion 112 is between an upper and radiallyinner edge 114 and a lower and radiallyinner edge 115. Each of the upper and radiallyinner edge 114 and the lower and radiallyinner edge 115 are on an axially outer edge or axially outer extremity of theannular scraper 110 with respect to an axis extending through the center of and concentric with theannular scraper 110 such that theannular scraper 110 encircles the axis. The upper and radiallyinner edge 114 and the lower and radiallyinner edge 115 comprise a portion of the outer annularmetallic shell portion 111. Accordingly, when apiston landing 117 traverses theannular scraper 110, the exposed metal edge (e.g. the lower and radiallyinner edge 115, which is on one of the axially outer edges of the annular scraper) of theannular scraper 110 contacts carbon deposits disposed on the side of thepiston landing 117 and scrapes down the carbon deposits, while preserving the inlaid thermalbarrier coating portion 112 and limiting debonding of the inlaid thermalbarrier coating portion 112. Removal of carbon deposits from thepiston 103 prevents those deposits from scratching and damaging thecylinder liner 104 as the piston reciprocates up and down between the top dead center and bottom dead center positions. - The inlaid thermal
barrier coating portion 112 acts as a thermal insulator that reduces the amount of heat that is transferred from hot combustion gases disposed between the piston landing 117 of thepiston 103, thecylinder head 105 to thecylinder liner 104. The reduction in heat transfer from the hot combustion gases to thecylinder liner 104 reduces the temperature of the liner and improves the fuel efficiency of engine assembly 100. By reducing the temperature of thecylinder liner 104, an oil film on thecylinder liner 104 is more aptly retained on the liner at the reversal point of the piston ring 106, thereby permitting the piston ring 106 to be placed higher in relation to the piston, thereby reducing the top land crevice volume (i.e. the volume between the top land of the piston and the cylinder liner wall). The fuel air mixture in the top land crevice volume is usually the last part of the mixture to burn, particularly on a pre-mixed gas engine. Accordingly, the fuel air mixture in that volume may not be completely burned, thereby generating unburnt hydrocarbon emissions and reducing the engines brake thermal efficiency. As such, reducing the heat loss (via transfer to the cylinder liner wall) through the use of the thermal barrier coating helps keep the top land crevice volume warmer permitting more complete combustion. As demonstrated in the illustrated embodiment, the inlaid thermalbarrier coating portion 112 and the upper and radiallyinner edge 114 and the lower and radiallyinner edge 115 may have substantially the same inner diameter. Theannular scraper 110 is illustrated in a symmetric configuration which permits theannular scraper 110 to be installed in either direction, but theannular scraper 110 may be asymmetric in accordance with example embodiments. In example embodiments, a thermal barrier coating portion of theannular scraper 110 may be bonded to a non-recessed surface of the outer annularmetallic shell portion 111. For example, the radially inner surface of the outer annular metallic shell may be linear or smooth, and a thermal barrier coating may be applied to a portion of the smooth surface. In such an embodiment, the lower and radiallyinner edge 115 of the outer annularmetallic shell portion 111 may extend further radially inward than the thermal barrier coating and the upper and radiallyinner edge 114 of the outer annularmetallic shell portion 111 may not extend as far radially inward as the lower radiallyinner edge 115 of the outer annularmetallic shell portion 111. - As utilized herein, the terms "approximately," "about," "substantially" and similar terms are intended to have a broad meaning in harmony with the common and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. It should be understood by those of skill in the art who review this disclosure that these terms are intended to allow a description of certain features described without restricting the scope of these features to the precise numerical ranges provided. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alterations of the subject matter described and are considered to be within the scope of the disclosure.
- For the purpose of this disclosure, the term "coupled" means the joining of two members directly or indirectly to one another. Such joining may be stationary or moveable in nature. Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate members being attached to one another. Such joining may be permanent in nature or may be removable or releasable in nature.
- It should be noted that the orientation of various elements may differ according to other exemplary embodiments, and that such variations are intended to be encompassed by the present disclosure. It is recognized that features of the disclosed embodiments can be incorporated into other disclosed embodiments.
- It is important to note that the constructions and arrangements of apparatuses or the components thereof as shown in the various exemplary embodiments are illustrative only, with the scope of protection being defined by the appended claims. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter of the appended claims. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied.
- Also, the technology described herein may be embodied as a method, of which at least one example has been provided. The acts performed as part of the method may be ordered in any suitable way unless otherwise specifically noted. Accordingly, embodiments may be constructed in which acts are performed in an order different than illustrated, which may include performing some acts simultaneously, even though shown as sequential acts in illustrative embodiments as long as such methods fall within the scope of the amended claims.
- The indefinite articles "a" and "an," as used herein in the specification and in the claims, unless clearly indicated to the contrary, should be understood to mean "at least one."
- As used herein in the specification and in the claims, "or" should be understood to have the same meaning as "and/or" as defined above. For example, when separating items in a list, "or" or "and/or" shall be interpreted as being inclusive, i.e., the inclusion of at least one, but also including more than one, of a number or list of elements, and, optionally, additional unlisted items. Only terms clearly indicated to the contrary, such as "only one of' or "exactly one of," or, when used in the claims, "consisting of," will refer to the inclusion of exactly one element of a number or list of elements. In general, the term "or" as used herein shall only be interpreted as indicating exclusive alternatives (i.e. "one or the other but not both") when preceded by terms of exclusivity, such as "either," "one of," "only one of," or "exactly one of." "Consisting essentially of," when used in the claims, shall have its ordinary meaning as used in the field of patent law.
- As used herein in the specification and in the claims, the phrase "at least one," in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements. This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase "at least one" refers, whether related or unrelated to those elements specifically identified. Thus, as a non-limiting example, "at least one of A and B" (or, equivalently, "at least one of A or B," or, equivalently "at least one of A and/or B") can refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including elements other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including elements other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other elements); etc.
- In the claims, as well as in the specification above, all transitional phrases such as "comprising," "including," "carrying," "having," "containing," "involving," "holding," "composed of," and the like are to be understood to be open-ended, i.e., to mean including but not limited to.
- The claims should not be read as limited to the described order or elements unless stated to that effect. It should be understood that various changes in form and detail may be made by one of ordinary skill in the art without departing from the scope of the appended claims. All embodiments that come within the scope of the following claims are claimed.
Claims (14)
- An annular scraper (110) for cleaning a portion of a piston (103) in an engine assembly, the annular scraper (110) comprising:
an outer annular metallic shell portion (111) and an inlaid thermal barrier coating portion (112); the inlaid thermal barrier coating portion (112) being concentric with the outer annular metallic shell portion (111), the annular scraper (110) being characterized by the inlaid thermal barrier coating portion (112) being positioned within an annular recess (113) between an upper and radially inner edge (114) and a lower and radially inner edge (115), the upper and radially inner edge (114) and the lower and radially inner edge (115) being positioned on an axially outer edge of the annular scraper (110). - The annular scraper (110) of claim 1, wherein at least one of the radially inner and axially outer edges (114; 115) of the annular scraper (110) includes the outer annular metallic shell portion (111).
- The annular scraper (110) of claim 1, wherein the outer annular metallic shell portion (111) of the annular scraper (110) comprises steel.
- The annular scraper (110) of claim 1, wherein the inlaid thermal barrier coating portion (112) comprises a material having a lower thermal conductivity than the outer annular metallic shell portion (111); or
wherein the inlaid thermal barrier coating portion (112) comprises a non-metallic material having a lower thermal conductivity than the metallic scraper (110); or
wherein the inlaid thermal barrier coating portion (112) comprises a ceramic material; or
wherein an inner diameter of the inlaid thermal barrier coating portion (112) is substantially the same as an inner diameter of the outer annular metallic shell portion (111). - An engine assembly (100), comprising: a cylinder block (101) including a cylinder bore (102) disposed therein, the cylinder bore (102) configured to house a piston (103); and an annular scraper (110) according to any one of Claims 1 to 4 disposed and positioned concentrically within the cylinder bore (102).
- The engine assembly of claim 5, further comprising a cylinder liner (104) disposed in the cylinder bore (102); wherein optionally
the annular scraper (110) is positioned within a recess (116) in the cylinder liner; wherein optionally
the engine assembly further comprises a piston (103) disposed within the cylinder bore (102) and within the cylinder liner (104); wherein optionally
the annular scraper (110) is positioned within the cylinder bore (102) between a cylinder head (105) and the piston (103), the cylinder head (105) configured to house an intake port, an intake valve, an exhaust port, and an exhaust valve. - A method of manufacturing an engine assembly (100), the method comprising:forming a cylinder block (101) having a cylinder bore (102) disposed therein, the cylinder bore (102) configured to house a piston (103); andpositioning an annular scraper (110) in the cylinder bore (102) such that the annular scraper (110) is concentric with the cylinder bore (102), the annular scraper (110) including an outer annular metallic shell portion (111) and an inlaid thermal barrier coating portion (112), the inlaid thermal barrier coating portion (112) positioned within an annular recess (113) between an upper and radially inner edge (114) and a lower and radially inner edge (115), the upper and radially inner edge (114) and the lower and radially inner edge (115) positioned on an axially outer edge of the annular scraper (110), the inlaid thermal barrier coating portion (112) concentric with the outer annular metallic shell portion (111).
- The method according to claim 7, further comprising positioning the inlaid thermal barrier coating portion (112) within the annular recess (113) in the outer annular metallic shell portion (111) such that at least one of the radially inner and axially outer edges of the annular scraper includes the outer annular metallic shell portion (111).
- The method according to claim 7, further comprising positioning a cylinder liner (104) in the cylinder bore (102); or
wherein the annular scraper (110) is positioned within a recess (116) in the cylinder liner (104). - The method according to claim 7, wherein the inlaid thermal barrier coating (112) portion comprises a ceramic material; or
wherein the inlaid thermal barrier coating portion (112) comprises a material having a lower thermal conductivity than the outer annular metallic shell portion (111). - The annular scraper (110) of claim 1, wherein the outer metallic shell portion (111) of the annular scraper further comprises:
an annular recess (113) within an inner surface of the outer annular metallic shell portion (111). - The annular scraper of claim 11, wherein the inlaid thermal barrier coating portion (112) comprises a material having a lower thermal conductivity than the outer annular metallic shell portion (111); or
wherein the inlaid thermal barrier coating portion comprises a ceramic material; or
wherein an inner diameter of the inlaid thermal barrier coating portion is substantially the same as an inner diameter of the outer annular metallic shell portion. - The annular scraper (110) of claim 1, wherein the outer annular metallic shell portion (111) includes a radially inner surface that is linear, and wherein the thermal barrier coating is bonded to the radially inner surface of the outer annular metallic shell portion (111) and concentric with the outer annular metallic shell portion (111).
- The annular scraper of claim 1, wherein at least one radially inner and axially outer edge (114; 115) of the annular scraper (110) includes the outer annular metallic shell portion (111); or
wherein the outer annular metallic shell portion (111) of the annular scraper (110) comprises steel; or
wherein the thermal barrier coating portion (112) comprises a material having a lower thermal conductivity than the outer annular metallic shell portion (111); or
wherein the thermal barrier coating portion (112) comprises a ceramic material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201461947273P | 2014-03-03 | 2014-03-03 | |
PCT/US2015/015390 WO2015134162A1 (en) | 2014-03-03 | 2015-02-11 | Carbon scraper |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3114338A1 EP3114338A1 (en) | 2017-01-11 |
EP3114338A4 EP3114338A4 (en) | 2017-11-01 |
EP3114338B1 true EP3114338B1 (en) | 2021-04-28 |
Family
ID=54055718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15758916.9A Active EP3114338B1 (en) | 2014-03-03 | 2015-02-11 | Carbon scraper |
Country Status (3)
Country | Link |
---|---|
US (1) | US9822702B2 (en) |
EP (1) | EP3114338B1 (en) |
WO (1) | WO2015134162A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170089259A1 (en) * | 2015-09-30 | 2017-03-30 | Corning Incorporated | Composite thermal barrier for internal combustion engine component surfaces |
US10302013B2 (en) | 2015-09-30 | 2019-05-28 | Corning Incorporated | Composite thermal barrier for combustion chamber surfaces |
US10578050B2 (en) | 2015-11-20 | 2020-03-03 | Tenneco Inc. | Thermally insulated steel piston crown and method of making using a ceramic coating |
US10519854B2 (en) | 2015-11-20 | 2019-12-31 | Tenneco Inc. | Thermally insulated engine components and method of making using a ceramic coating |
AT519790B1 (en) * | 2017-04-13 | 2019-01-15 | Avl List Gmbh | Internal combustion engine |
CN107387252A (en) * | 2017-09-13 | 2017-11-24 | 中原内配集团股份有限公司 | A kind of dry liner and preparation method thereof |
EP3724479A4 (en) | 2017-12-14 | 2021-08-25 | Cummins Inc. | Antipolishing ring |
IT201800020110A1 (en) * | 2018-12-18 | 2020-06-18 | Fpt Motorenforschung Ag | DIESEL INTERNAL COMBUSTION ENGINE |
CN109751113A (en) * | 2018-12-28 | 2019-05-14 | 国营第六一六厂 | A kind of burning chamber of diesel engine and the method for improving burning chamber of diesel engine carbon distribution |
CN109869239A (en) * | 2019-04-15 | 2019-06-11 | 一汽解放汽车有限公司 | A kind of engine piston |
WO2021126509A1 (en) * | 2019-12-17 | 2021-06-24 | Cummins Inc. | Compound diameter carbon scraper ring |
JP7348100B2 (en) * | 2020-02-18 | 2023-09-20 | 三菱重工エンジン&ターボチャージャ株式会社 | Heat shielding film components |
EP4158178A1 (en) * | 2020-05-27 | 2023-04-05 | Cummins, Inc. | Anti-polish ring for an engine cylinder |
US11428189B1 (en) * | 2021-05-12 | 2022-08-30 | Caterpillar Inc. | Piston bowl geometry, cuff and top land interaction for reduced hydrocarbons, improved combustion efficiency, and piston temperature |
JP7302701B1 (en) * | 2022-04-13 | 2023-07-04 | いすゞ自動車株式会社 | internal combustion engine |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2752633A1 (en) | 1977-11-25 | 1979-05-31 | Kloeckner Humboldt Deutz Ag | CYLINDER FOR A RECEPTACLE COMBUSTION MACHINE |
JPS6044506B2 (en) * | 1979-02-17 | 1985-10-03 | 日野自動車株式会社 | Internal combustion engine cylinder liner |
US4474147A (en) | 1981-12-10 | 1984-10-02 | Mack Trucks, Inc. | Combined fire ring and carbon scraping insert |
BR8500556A (en) * | 1985-02-07 | 1986-09-09 | Metal Leve S/A. Industria E Comercio | PUMP AND PUMP MANUFACTURING PROCESS FOR INTERNAL COMBUSTION ENGINES |
FI95830C (en) * | 1994-05-27 | 1996-03-25 | Waertsilae Diesel Int | antipolishingring |
US5660399A (en) | 1995-08-16 | 1997-08-26 | Northrop Grumman Corporation | Piston rings particularly suited for use with ceramic matrix composite pistons and cylinders |
US6164260A (en) | 1999-07-13 | 2000-12-26 | Caterpillar Inc. | Scraping ring and sealing ring used with a cylinder liner in an internal combustion engine |
GB0220685D0 (en) | 2002-09-05 | 2002-10-16 | Innogy Plc | A cylinder for an internal combustion engine |
US7438039B2 (en) * | 2004-02-06 | 2008-10-21 | Electro-Motive Diesel, Inc. | Large-bore, medium-speed diesel engine having piston crown bowl with acute re-entrant angle |
EP2535540B1 (en) | 2011-06-16 | 2016-07-20 | Wärtsilä Switzerland Ltd. | Insert for a cylinder of a combustion engine |
US9562491B2 (en) * | 2012-04-20 | 2017-02-07 | International Engine Intellectual Property Company, Llc. | Carbon scraping ring with abradable coating |
-
2015
- 2015-02-11 EP EP15758916.9A patent/EP3114338B1/en active Active
- 2015-02-11 US US15/113,726 patent/US9822702B2/en active Active
- 2015-02-11 WO PCT/US2015/015390 patent/WO2015134162A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP3114338A4 (en) | 2017-11-01 |
WO2015134162A1 (en) | 2015-09-11 |
US9822702B2 (en) | 2017-11-21 |
US20170002734A1 (en) | 2017-01-05 |
EP3114338A1 (en) | 2017-01-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3114338B1 (en) | Carbon scraper | |
CN106224110B (en) | Cylinder liner assembly with thermal barrier coating | |
US7334546B2 (en) | Cylinder liner | |
JP6771480B2 (en) | Cylinder liner for opposed-piston engine | |
US11840981B2 (en) | Thermal barrier coating member | |
US20160097340A1 (en) | Cylinder liner assembly having air gap insulation | |
EP3146188B1 (en) | Piston with keystone second ring groove for high temperature internal combustion engines | |
JP2012047134A (en) | Internal combustion engine | |
EP2998617A1 (en) | A top piston ring for a large two-stroke turbo-charged uniflow-scavenged internal combustion engine with crossheads | |
JP2019516901A (en) | Piston having an under crown surface having an insulating covering layer and method of manufacturing the same | |
CN204877696U (en) | A cylinder liner and internal -combustion engine for engine | |
JP2017089411A (en) | Internal combustion engine | |
JP6490440B2 (en) | Monoblock engine cylinder structure | |
JP2013148026A (en) | Cylinder liner | |
JP2019510918A (en) | Barrier ring and assembly for opposed piston engine cylinders | |
JP2014034917A (en) | Piston structure of engine | |
US11041455B2 (en) | Engine cylinder liner with liner catcher | |
US10077735B2 (en) | Captured engine cylinder sleeve and coating | |
JP6526523B2 (en) | Cylinder block | |
JP6574990B2 (en) | Piston with reduced topland height and closely topland piston shape | |
JP5932739B2 (en) | Internal combustion engine cylinder block | |
US11898488B2 (en) | Piston bowl geometry, cuff and top land interaction for reduced hydrocarbons, improved combustion efficiency, and piston temperature | |
US11428189B1 (en) | Piston bowl geometry, cuff and top land interaction for reduced hydrocarbons, improved combustion efficiency, and piston temperature | |
KR101977911B1 (en) | Piston for internal combustion engine and its manufacturing method | |
JP2014080891A (en) | Poppet valve |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20160627 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SAAD, PHILIPE Inventor name: WATANABE, ATSUHIKO Inventor name: KITCHEN, ANDREW G. |
|
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20171004 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F02B 77/04 20060101AFI20170927BHEP Ipc: F02F 1/20 20060101ALI20170927BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20190628 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R079 Ref document number: 602015068671 Country of ref document: DE Free format text: PREVIOUS MAIN CLASS: F02B0077040000 Ipc: F16J0010040000 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F16J 10/04 20060101AFI20201014BHEP Ipc: F02B 77/04 20060101ALI20201014BHEP Ipc: F02F 1/20 20060101ALI20201014BHEP Ipc: F02F 1/00 20060101ALI20201014BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20201119 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602015068671 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1387427 Country of ref document: AT Kind code of ref document: T Effective date: 20210515 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210728 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210828 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210729 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210728 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210830 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20210428 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602015068671 Country of ref document: DE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20220131 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20220119 Year of fee payment: 8 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210828 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20220228 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220211 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220228 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220228 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220211 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220228 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220228 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230510 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 1387427 Country of ref document: AT Kind code of ref document: T Effective date: 20230211 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230211 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20150211 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20240228 Year of fee payment: 10 Ref country code: GB Payment date: 20240227 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210428 |